Messages in this thread | | | Date | Tue, 6 Feb 2007 22:20:11 +0100 | From | Ingo Molnar <> | Subject | Re: 2.6.20-rc6-mm3 |
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* Ingo Molnar <mingo@elte.hu> wrote:
> > I don't have that enabled tho .. This is with HRT/dynamic tick both > > off.. > > your kernel utilizes the kernel in a more optimal way: the new ^hardware > clockevents code now utilizes the local APIC timer irq (represented by > the LOC field) for periodic interrupts. The local APIC timer irq has a > cost of ~2 usecs per IRQ, while the PIT irq is ~10 usecs per irq. With > HZ=1000 this means savings of ~8000 usecs per second - i.e. 8 msecs per > second, which is 0.8% more raw CPU power available - which isnt that > bad.
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